Officials for the 2012 London Olympics have announced the costs and confirmed the builders for the Olympic Stadium and aquatic center.

The Olympic Delivery Authority (ODA) said Tuesday the 80,000 - seat Olympic Stadium will cost about $976 million and will be built by a consortium including HOK Sport, Buro Happold and Robert Alpine.

The price includes the cost of converting the stadium to a 25,000 seat multiple-use venue after the Olympics.

Meanwhile, the Aquatics Center and land bridge that will be a main gateway into the Olympic Park will cost some $476 million. The venue, which will be built by Balfour Beatty, will seat 2,500 people when it is reconfigured after the Games.